.doc-page {
    width:100%;
    height: 100%;
    flex-direction: column;
}
.item-div {
    flex-direction:column;
    align-items:center;
    justify-content:space-around;
    height:100%;
}
.item-child {
    width:100%;
    height:100%;
    justify-content:space-around;
    align-items:center;
}
.item-group-child {
    justify-content: center;
    align-items: center;
    width:100%;
    height: 100%;
}